Rock-drilling mechanism



Aug. 26, 1930. c. F. osGooD I ROCK DRILLING MECHANISM Filed Deo. 26r1922 lll l''artentecl Augi."26,193() a I osGooi), on l .eHRLn sinT s 1.RoonLiner'tiernak MECHANISM Application@meanecembef 26,1922.seriarNoL-eoaia?.

{Myinvention relate'sk'to n anisms, and more particularlyfto improyedcontrolling mechanisms. for that typelofrock drilling mechanism vknownasa stoper. l

' .An object of my invention is to providev an improved rockfdrilling.mechanism.' Another object of myfinvention isto previde an improvedfeeding. mechanism y having `Vim'- proved .('zontrollingv means.furtherl object of my invention is .to provide-animproved controllingmeans for' pressure fluid feeding mechanisms especially adapted for (usein v' that class of rock drilling work known vasy .Y stoping and inwhich thecontr-ol mechanismy may be most conveniently located. Otherobjects and advantages of my invention. will hereinafter more fullyappear.

In the accompanyingv drawings I have yshown for purposes of illustrationone form which my invention may assume 'in'practice In these drawingsf#Y Fig. 1 is' a view Ypartially in elevation` and partially broken away,showing a drilling mechanism embodying my improved construction. y

Fig. 2 is a section on the line 2-2 of Fig. 1. Fig. 3 is a section onthe line 3-3 of Fig. 2.

For purposes of illustration I have shown' my improved feedingmechanism. employed 1n connection Wlth a percussivemotor 1 of well-knownform, which motor is adapted to impart a series ofblows to adrillsteel2and to be maintained in proper relation to a drill steel as the hole is'deepened v by a feeding mechanism 3 herein of well known form com- Y`prising a cylinder 4 having a bore 5 in which a piston 6 is disposed.:As shown, this piston Y Y 6y is provided with apiston rod 7 and whenthe extremity of the latter, which is provided `against some solidsupport, admission ofl air with an abutment engagingpoint 8,` isfixed tothe feed cylinder 4 will cause the same and the drill v1 to be advancedrelative tothe pis- Vton 6. Any suitable controlling valve 9may beemployed for the purpose .of controlling the operation of the motor 1and the supply of operating fluid to the feeding mechanism', a port 10leading from the throttle valve 9 and being controlled by. the latter.

l have herein provided improvedccafiiml#u ligfgzifleqhnisiilffof'tilgfedig.megehafism Which'i's adaptedto render it possible; to coi.

troll theaction of the'ifeediyely closely. manual grasping handle 11 isarranged;

jectingV laterally f from thefdrilling ymech e.; 'nisin at a pointbetweenthe feedingmela Anifsmfar'id the rear end of the motorl. ThisVhandle ism'ade Vhollow as indica-tedat"12l and has :a hand kgrip`portion 13 turned atgright ri-agite to the body of are handle and; intomechanism.` Arranged. .partially inv anintel?` mediate headfllbetweenthemotorla'nd the .feeding mechanism and .partially infafbossf 15at ftheforward endl ofthe feed Vcylinder 4- is la''control,valve..controlling thesupply of ,pressure Huidl from-the vport 10, to a .port.16 which'opens'into the .upper endfofthe feedv cylinder.`'Thisfizalvemechanism comprises a recess 1 7 having a valve seatf18latjits rear; ward. end .withwhich a valve .member 19 reciprocable inthe`recess'17 isfadapted to co`-` Y operate. .The valve. memberl 19. .is.provided with ,a shoulder or, .collarV ,'20pupon whichfa spring 21,Aseated in f an. enlargement-17' of the recess '17,. presses.y vApassage22,extends from its-pointof communication with Vthe portlOfto apoint adjacentthe valve seatf1i8 and opens; atright angles tothe lengthofithe irecess 17 intothelatter ata pointlsoselected that the v:port 22 may-beuncovered Whenihe springl 21 hasfforcedthe rvalve member 19 to itseXtreme forward position. v'I`he.fport v 16V .opens through the' middlefof the-valveV seat .18.* The valve` imember; 19 is'fprovided stem,28,'while at itsotherfend 28`itislen- 'gaged the stem29 lofpacontrolbutton. .530. The stem 29 yis provided with afcollar 31V n.

yagainst Whichjawspringy 32,` located in aigrecess?) inthe portion13 ofthehandleycoacts', thespr-ing.82holdingV thesteml29 in elevatedpositionso'` that the yvalve` 19 .is nor- Y mally" maintainediopenf. It willybeundersteed. that Itheir.)atten Benam.eperatedby 6ol parallelism withthe. airis ofthedrilling vthe thumb or by a finger or in any otherdesired manner by the drill runner.

f From` the foregoing description, the mode of operation of my.invention as shown herein for illustration will be readily apparent.The drilling mechanism will lbelarranged in position to drill a hole.The throttle valve 9 will be opened to supply `air to theport l() and;if?. @peset-.Mlle motor, 1.-. -Bypdepressins the button 30 a-ndfsothestemI 29, the lever-26 I Vmay be oscillated about its pivot 25 andycaused to move the valve 19 toda `position; to close Voit' communicationbetween the ports i 22 and 16, and so' the strength of feed may 'berreadiiy c orntrolled,yj ust enough Cair being'adf mated pagina :yeivell19 te hola the drin yup position during spotting' It willbe posvsible,}after thelhole is l started, by rel/easing button i to `allevv feed -at sub'stantially full air pressure and at anytiineby depressingythe vbutton 3Q tliefsupplyk ofair to the feed. cylinderniay` beinterrupted 'and by reasorio'f leakage, orfexp'ansion; 'should thefeedbe veryrapid,l the force of feed will be Vquickly reduced i WhileI'khavein described one form which my invention may assume in'practice,it .will be.understoody that thii's'form.` of the saine .is shown. forpurposes ofil'lustrati'o'n and,` that the` invention may be modifiedandv embodied in ,various other V:forms withoutdepartingfroniits spiritor the scope ofthe appended claimsf I claiin yas new' and desiretosecure by Lettersy` Patent :V

1; In a y'rock.arming mechanismen@ @en i lbination with ya hammer drilland a pressure iiuidl feeding device attached thereto', of a handlef*or;isupportingV said drilling mechaf nismvvproje'cting laterally asubstantial dis tance therefroim ymeans for controlling the admissibnofair to the feeding device includa'member .arranged adjacent the innerendof said handle anda pivoted lever cooperatingwiththe samev extendingto a point 'adjacent' the outer end of said handle,and manualynieansfo'r actuating saidv lever to op'- eratesaid control means. I' lY 2; In ailuidv pressure tool, the combination with "a *hammerI drilland a fluid presf siire feeding device attached thereto, control; lin"means.for"said feeding device including a iiidsnpply port for :admittingpressure 'iuid to saidffeeding. defvice,a valve movable its teinterrupt' supply through.. said port, a

.handle having aigrasping portion arranged parallel to the lengthloflsaidl drilling mechanisi', and means arranged Vin land movable :f Sadlast mentioined' portion for' controlling saidyalveI!l I drillingmechanism com'j'nising work performing means and` pressurefluidgoperated feeding 'means therefor; a lsupporting handle projectingfrom said mech'anism having-a vportion adapted to be grasped" by thethisgapplication operator, and means including a valve remote from saidgrasping portion, and a pivoted lever cooperating therewith enabling theoperator to control the How of pressure iiuid to the feeding means bybut a single hand without removing said hand from said handie. l

4.-. -A drilling mechanism comprising a drilling motor and, pressureliu-id voperated feeding meanstherefona supporting handle projectingfrom said mechanism adapted to v,be.grasped byithe operator, an elementinterposed between said motor and said feeding `means vhaving a fluidpassage formed therein signature. x

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